scholarly journals Novel Insights into the Effect of Pythium Strains on Rapeseed Metabolism

2020 ◽  
Vol 8 (10) ◽  
pp. 1472
Author(s):  
Kateřina Bělonožníková ◽  
Kateřina Vaverová ◽  
Tomáš Vaněk ◽  
Miroslav Kolařík ◽  
Veronika Hýsková ◽  
...  
Keyword(s):  
Plant Growth ◽  
Biological Control Agent ◽  
Effective Strain ◽  
Hydrolytic Enzymes ◽  
Biochemical Properties ◽  
Control Agent ◽  
Growth Promoters ◽  
Pythium Oligandrum ◽  
Defense Compounds ◽  
Plant Growth Promoters

Pythium oligandrum is a unique biological control agent. This soil oomycete not only acts as a mycoparasite, but also interacts with plant roots and stimulates plant defense response via specific elicitors. In addition, P. oligandrum can synthetize auxin precursors and stimulate plant growth. We analyzed the secretomes and biochemical properties of eleven Pythium isolates to find a novel and effective strain with advantageous features for plants. Our results showed that even closely related P. oligandrum isolates significantly differ in the content of compounds secreted into the medium, and that all strains secrete proteins, amino acids, tryptamine, phenolics, and hydrolytic enzymes capable of degrading cell walls (endo-β-1,3-glucanase, chitinase, and cellulase), exoglycosidases (especially β-glucosidase), proteases, and phosphatases. The most different strain was identified as a not yet described Pythium species. The changes in metabolism of Brassica napus plants grown from seeds coated with the tested Pythium spp. were characterized. Enhanced levels of jasmonates, ethylene precursor, and salicylic acid may indicate better resistance to a wide variety of pathogens. Glucosinolates, as defense compounds against insects and herbivores, were enhanced in young plants. Altogether, P. oligandrum strains varied in their life strategies, and either they could perform equally as plant growth promoters and mycoparasites or they had developed one of these strategies better.

scholarly journals Diversity and function of culturable actinobacteria in the root-associated of Salvia miltiorrhiza Bunge

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11749
Author(s):  
Yu-Rui Wu ◽  
Cui-Bai Li ◽  
Yan-Hong Wu ◽  
Lan Li ◽  
Bo Li ◽  
...  
Keyword(s):  
Plant Growth ◽  
Biological Control Agent ◽  
Salvia Miltiorrhiza ◽  
Control Agent ◽  
Growth Promoters ◽  
Nitrogen And Phosphorus ◽  
Nutrient Use ◽  
Plant Growth Promoters ◽  
And Function ◽  
Agent Development

The root-associated actinobacteria play important roles in plant growth, nutrient use, and disease resistance due to their functional diversity. Salvia miltiorrhiza is a critical medicinal plant in China. The root actinobacterial community structure has been studied; however, the functions of root-associated actinobacteria of S. miltiorrhiza have not been elucidated. This study aimed to decipher the diversity and function of the culturable root-associated actinobacteria in plant growth using culture-dependent technology and culturable microbe metagenomes. We isolated 369 strains from the root-associated actinobacteria, belonging to four genera, among which Streptomyces was dominant. Besides, the functional prediction revealed some pathways related to plant growth, nitrogen and phosphorus metabolism, and antagonistic pathogens. We systematically described the diversity and functions of the culturable root-associated actinobacteria community. Our results demonstrated that the culturable root-associated actinobacteria of S. miltiorrhiza have rich functionalities, explaining the possible contribution of culturable root-associated actinobacteria to S. miltiorrhiza’s growth and development. This study provides new insights into understanding the function of the culturable root-associated actinobacteria and can be used as a knowledge base for plant growth promoters and biological control agent development in agriculture.

scholarly journals AKTIVITAS SIDEROFOR BACILLUS SUBTILIS SEBAGAI PEMACU PERTUMBUHAN DAN PENGENDALI PATOGEN TANAMAN TERUNG

2017 ◽  
Vol 17 (2) ◽  
pp. 170 ◽  
Author(s):  
Nur Prihatiningsih ◽  
Heru Adi Djatmiko ◽  
Puji Lestari
Keyword(s):  
Biological Control ◽  
Bacillus Subtilis ◽  
Plant Growth ◽  
Biological Control Agent ◽  
Control Agent ◽  
Leaf Number ◽  
Growth Promoters ◽  
Root Volume ◽  
Volume Weight ◽  
Plant Growth Promoters

Siderophore activity of Bacillus subtilis as plant growth promoters and biological control agent of eggplants pathogens. The aims of this research were to identify the siderophores of B. subtilis, to assess its activities as plant growth promoters and biological control agent of eggplants pathogens. Five isolates of B. subtilis i.e.B46, B209, B211, B298 and B 315 grown on SDCASA medium. The isolate which showed the best siderophores production was then further studied on its ability as a growth promoter on eggplants in two soil types with different Fe content. The inhibitory test was conducted against two kinds of pathogens, namely Colletotrichum sp. and Ralstonia solanacearum. The greenhouse experiment was arranged using a factorial completely randomized block design. The first factor was the B. subtilis (B. subtilis B298 and without B. subtilis B298), second factor was the type of soil (Ultisol and Andisol). The variables measured were Fe uptake by plants, plant growth parameters on eggplant i.e. height, leaf number, root length, root volume, weight of fresh and dried shoot as well as fresh and dry root, percentage of inhibition to fungal and bacterial eggplant pathogens. The results showed that the five isolates of B. subtilis were able to produce siderophores as catecholate and hydroxamate types. The best siderophore production was showed by B. subtilis B298. The ability of B. subtilis B298 in accelerating the growth of plants was indicated by the increased of uptake Fe, plant height, leaf number, root volume, weight of dried plants by 45.62%, 25.48%, 19.45%, 41.10% and 34.89% respectively. The inhibition to the fungal and bacterial eggplant pathogens best shown by the isolates of B. subtilis B298 with 55.4% and 22 mm respectively.

scholarly journals Biostimulants and Microorganisms Boost the Nutritional Composition of Buckwheat (Fagopyrum esculentum Moench) Sprouts

Agronomy ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 469 ◽  
Author(s):  
Robert Witkowicz ◽  
Wioletta Biel ◽  
Joanna Chłopicka ◽  
Agnieszka Galanty ◽  
Katarzyna Gleń-Karolczyk ◽  
...  
Keyword(s):  
Biological Control ◽  
Chemical Composition ◽  
Plant Growth ◽  
Nutritional Composition ◽  
Biological Control Agents ◽  
Growth Promoters ◽  
Pythium Oligandrum ◽  
Plant Growth Promoters ◽  
Fiber Fractions ◽  
Fagopyrum Esculentum Moench

This study investigated the influence of biological control agents and plant growth promoters on the chemical composition of the cultivars Panda and Kora buckwheat sprouts. Before sowing, seeds were soaked in solutions containing Bacillus subtilis bacteria, Pythium oligandrum oospores, Ecklonia maxima algae extract, and/or nitrophenols. The sprouts of the Panda displayed higher levels of protein, fat, and dietary fiber fractions than the Kora. Measurable effects of biological control agents (BCAs) and plant growth promoters (PGPs) on the chemical composition of sprouts were also confirmed. Soaking the seeds in a solution containing P. oligandrum oospores resulted in a decrease in the level of crude ash in sprouts, while the addition of nitrophenols increased the level of both crude ash and protein. We also found statistically significant effects of interactions between the cultivar and BCA and/or PGP for each of the examined components.

scholarly journals Seaweeds’ carbohydrate polymers as plant growth promoters

2021 ◽  
pp. 100097
Author(s):  
Diana Pacheco ◽  
João Cotas ◽  
Carolina P. Rocha ◽  
Glacio S. Araújo ◽  
Artur Figueirinha ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Promoters ◽  
Carbohydrate Polymers ◽  
Plant Growth Promoters

Polysaccharides extracted from Moroccan seaweed: a promising source of tomato plant growth promoters

2018 ◽  
Vol 30 (5) ◽  
pp. 2953-2962 ◽  
Author(s):  
A. Mzibra ◽  
A. Aasfar ◽  
H. El Arroussi ◽  
M. Khouloud ◽  
D. Dhiba ◽  
...  
Keyword(s):  
Plant Growth ◽  
Tomato Plant ◽  
Growth Promoters ◽  
Plant Growth Promoters ◽  
Promising Source

Biotechnology and Environmental applications of Trichoderma spp.

2021 ◽  
pp. 149-157
Author(s):  
Waill A. Elkhateeb ◽  
Marwa O. Elnahas ◽  
Ghoson M. Daba ◽  
Abdel-Nasser A. Zohri
Keyword(s):  
Biological Control ◽  
Agricultural Soils ◽  
Hydrolytic Enzymes ◽  
Biological Control Agents ◽  
Growth Promoters ◽  
Trichoderma Spp ◽  
Trichoderma Species ◽  
Plant Growth Promoters ◽  
Different Strains ◽  
Soil Borne Fungi

The genus Trichoderma is multicultural soil-borne fungi found in different ecosystems. They are highly successful colonizers of their habitats. Genus Trichoderma is capable of dealing with various environments such as compost, agricultural soils, rhizosphere, and waste material. Therefore, different strains of Trichoderma have been applied in agriculture, bioremediation, waste management, and biotechnology. Many Trichoderma species act as biological control agents and plant growth promoters. Additionally, the genus Trichoderma is a new fungal source for the production of cyclosporin A as well as various hydrolytic enzymes with industrial importance.

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